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/* Get signed integer and fractional parts of a floating-point number.
Copyright (C) 2012-2025 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <math.h>
double
modf (double x, double *iptr)
{
if (isfinite (x))
{
double integer_part = trunc (x);
*iptr = integer_part;
return x - integer_part;
}
else
{
if (isinf (x))
{
*iptr = x;
return 1.0 / x;
}
else /* isnand (x) */
{
*iptr = x;
return x;
}
}
}
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